Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 17-09-2020 and time 18:57:23 (Italy) in region 3 km SW Amatrice (RI)

A magnitude ML 1.1 earthquake occured in region: 3 km SW Amatrice (RI), on

  • 17-09-2020 16:57:23 (UTC)
  • 17-09-2020 18:57:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6090, 13.2640 at 11 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Amatrice RI 3 2657 2657
Cittareale RI 9 482 3139
Montereale AQ 9 2581 5720
Accumoli RI 10 667 6387
Capitignano AQ 10 665 7052
Campotosto AQ 10 542 7594
Borbona RI 15 617 8211
Posta RI 17 694 8905
Cagnano Amiterno AQ 17 1369 10274
Barete AQ 18 737 11011
Arquata del Tronto AP 19 1178 12189
Crognaleto TE 19 1297 13486
Pizzoli AQ 19 4326 17812

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NW of L'Aquila (69753 inhabitants)
37 Km W of Teramo (54892 inhabitants)
51 Km E of Terni (111501 inhabitants)
60 Km SE of Foligno (57155 inhabitants)
73 Km W of Montesilvano (53738 inhabitants)
79 Km W of Chieti (51815 inhabitants)
80 Km W of Pescara (121014 inhabitants)
81 Km NE of Guidonia Montecelio (88673 inhabitants)
81 Km NE of Tivoli (56533 inhabitants)
90 Km SE of Perugia (166134 inhabitants)
97 Km E of Viterbo (67173 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.1 2020-09-17
16:57:23		 42.6087 13.2645 11 2020-09-17
17:14:24		 Sala Sismica INGV-Roma 82987251
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-17 16:57:23 ± 0.06
Latitude 42.6087 ± 0.0036
Longitude 13.2645 ± 0.0037
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 82987251

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 308
Semi-minor axis of confidence ellipse (meter) 275
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 10
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.05666
Epicentral distance of station farthest from the epicenter (degree) 0.30757
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 82987251
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-17 17:14:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2020-09-17T16:57:35.22 0.3 undecidable manual S 9 32.6451 91 0.19 94
IV.NRCA.HHZ. 2020-09-17T16:57:33.50 0.3 undecidable manual S 334 27.75 91 -0.23 93
IV.TERO.HHZ. 2020-09-17T16:57:33.49 0.3 undecidable manual S 87 27.75 91 -0.23 92
IV.LNSS.HHZ. 2020-09-17T16:57:31.12 0.3 undecidable manual S 268 18.2706 94 -0.08 99
IV.MC2.EHZ. 2020-09-17T16:57:30.57 0.3 undecidable manual P 350 34.1436 91 0.04 96
IV.MMO1.EHZ. 2020-09-17T16:57:30.36 0.3 undecidable manual P 9 32.6451 91 0.06 96
IV.NRCA.HHZ. 2020-09-17T16:57:29.49 0.3 undecidable manual P 334 27.75 91 -0.07 96
IV.RM33.EHZ. 2020-09-17T16:57:29.41 0.3 undecidable manual S 200 11.7771 113 -0.09 100
IV.TERO.HHZ. 2020-09-17T16:57:29.60 0.3 undecidable manual P 87 27.75 91 0.05 97
IV.LNSS.HHZ. 2020-09-17T16:57:28.22 0.3 undecidable manual P 268 18.2706 94 0.12 96
IV.SMA1.EHZ. 2020-09-17T16:57:28.21 0.3 undecidable manual S 67 6.2937 142 -0.13 98
IV.RM33.EHZ. 2020-09-17T16:57:27.27 0.3 undecidable manual P 200 11.7771 113 0.15 96
IV.SMA1.EHZ. 2020-09-17T16:57:26.69 0.3 undecidable manual P 67 6.2937 142 0.25 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:1.5 0.00044 0.24 AML other m 2020-09-17T16:57:28.49
IV.SMA1.EHE. ML:1.8 0.0009995 0.46 AML other m 2020-09-17T16:57:28.57
IV.RM33.EHN. ML:1.1 0.0001255 0.5 AML other m 2020-09-17T16:57:29.99
IV.RM33.EHE. ML:1.0 0.00010850000000000001 1.28 AML other m 2020-09-17T16:57:30.29
IV.LNSS.HHE. ML:1.0 0.00006825 0.76 AML other m 2020-09-17T16:57:31.55
IV.LNSS.HHN. ML:1.0 0.0000854 0.4 AML other m 2020-09-17T16:57:32.14
IV.TERO.HHN. ML:1.2 0.0000842 1.04 AML other m 2020-09-17T16:57:34.20
IV.TERO.HHE. ML:1.1 0.0000674 0.14 AML other m 2020-09-17T16:57:34.19
IV.NRCA.HHE. ML:0.9 0.000046909545 0.1408 AML other m 2020-09-17T16:57:33.67
IV.NRCA.HHN. ML:0.9 0.000038460040000000004 0.1152 AML other m 2020-09-17T16:57:33.52
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download